im trying to get into cold weather backpacking (northern MN all times during the winter) where temps could range from 35 to -20.

im want to put together a few light jackets to make a go to jacket for these situations. such as the 3-in-1 jackets that are common at say rei. i already have a light weight down jacket some may call a sweater.

what do you guys use as the outer shell and do i need another layer (this is not including my long underwear and shirts)